GMC Sierra IV (2018-2022) computer data lines system Wiring diagrams

BACK BACK- WARD BACKUP LAMP CTRL BLK/WHT WIRE BLU/BLK WIRE BLU/GRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COAX 1-RD COAX 2-RD COAX CU COMPUTER DATA LINES SYSTEM FORWARD/ GRN/WHT WIRE GRY/GRN WIRE HOME INFO DISPLAY MODULE LOGIC LOW SPEED GMLAN SERIAL DATA 2 LVDS MUTE NCA WIRE RADIO RED/WHT WIRE RIGHT FRONT MOBILE TELEPHONE MICROPHONE SERIAL DATA (-) 9 SERIAL DATA COMMUNICATION ENABLE VIO/YEL WIRE W/ DIGITAL AUDIO SYSTEM W/ ONSTAR WHT/BLU WIRE WHT/GRN WIRE WIR BG

A/C COMPRESSOR CLUTCH RELAY CONTROL A/C REFRIGERANT PRESSURE SENS SIG ACCELERATOR PEDAL POSITION LOW REF 1 ACCELERATOR PEDAL POSITION LOW REF 2 ACCELERATOR PEDAL POSITION SENSOR ACCELERATOR PEDAL POSITION SIG 1 ACCELERATOR PEDAL POSITION SIG 2 ACCESSORY WAKEUP SERIAL DATA AIR CONDITIONING SYSTEM AMBIENT AIR TEMP SENS SIG ANTI-THEFT SYSTEM BATTERY POSITIVE VOLT 4 BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BRAKE POSITION SENS SIG BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CHECK ENGINE INDICATOR CONTROL COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG DISABLE SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE CONTROL SENS LOW REFERENCE 2 ENGINE OIL LEVEL SWITCH EVAP PURGE SOLENOID VALVE CONTROL FUEL PUMP PRIMARY RELAY CONTROL GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE HIGH SPEED GMLAN SERIAL DATA (+) 7 HIGH SPEED GMLAN SERIAL DATA (-) (1) HOOD STATUS A SIG MASS AIR FLOW SENS SIG MIRROR AMBIENT AIR TEMPERATURE SENSOR MULTI-FUNCTION INTAKE AIR SENSOR OIL LEVEL SWITCH SIG OIL PRESSURE SENS SIG POWERTRAIN MAIN RELAY FUSED SPLY 1 POWERTRAIN MAIN RELAY FUSED SPLY 2 POWERTRAIN RELAY COIL CONTROL RED/BRN WIRE RUN/CRANK IGNITION 1 VOLT 4 STARTER ENABLE RELAY CONTROL STARTING/CHARGING SYSTEM TRANSMISSION PARK/NEUTRAL SIG 1 TRANSMISSIONS SYSTEM VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/WHT WIRE

BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE BRAKE APPLY BRN WIRE BRN/RED WIRE BRN/WHT WIRE CLUSTER COMPUTER DATA LINES SYSTEM DATA 1 (+) DISABLE SIG FUEL PRESSURE FUEL PRESSURE SENSOR FUEL PUMP FUEL PUMP CTRL FUEL PUMP SUPPLY FUSED BATT GMLAN SERIAL GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GRY WIRE HI SPD GMLAN HIGH SPD IGN 1 VOLT 4 INSTRUMENT LOW REF PHASE 3 POSITIVE VOLTAGE 53 POWER MODULE PRIMARY FUEL PUMP, LEVEL SENSOR ASSEMBLY RED/BRN WIRE RED/VIO WIRE RELAY CTRL SECONDARY SECONDARY FUEL PUMP SENS 2 LO REF SENS CTRL SENS LO REF SENS LOW REF SENS SIG SENS SIG 2 SERIAL SERIAL DATA (-) 7 SHIELD GND SUPPLY VOLTAGE SYSTEM VIO/BLU WIRE VIO/GRN WIRE VOLTAGE PHASE 2 W/ DUAL TANK W/O DUAL TANK WAKE UP SIG WHT WIRE WHT/BRN WIRE WHT/GRN WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE

BATT POS BATTERY POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE PEDAL POSITION SENSOR BRN WIRE BRN/RED WIRE BRN/WHT WIRE CHECK ENG CLUSTER SYSTEM COMPUTER DATA COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE OIL IND ENGINE OIL PRESSURE SENSOR EVAP VENT SOL VALVE CTRL EVAPORATIVE EMISSION PURGE SOLENOID VALVE FUEL GAUGE IND FUEL LEVEL SENS LO REF FUEL PRESS SENS LO REF FUEL PRESS SENS SIG FUEL PRESSURE SENSOR FUEL PUMP FUEL PUMP CTRL FUEL PUMP PRIMARY RLY CTRL FUEL TANK PRESS SENS SIG FUEL TANK PRESSURE SENSOR GMLAN GMLAN SER DATA (-) 7 GND 18 GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/GRN WIRE IND CNTRL INSTRUMENT INSTRUMENT CLUSTER LINES SYSTEM LO SPD LOGIC MALFUNCTION IND LIGHT POWER DISTRIBUTION SYSTEM PRESS SENS LO REF PRIMARY FUEL LVL SENS SIG PRIMARY FUEL PUMP, LEVEL SENSOR ASSEMBLY RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RELAY CTRL RUN/CRANK IGNITION 1 VOLT SHIELD GND SPLY VOLT PHASE 2 SPLY VOLT PHASE 3 TRANSMISSIONS SYSTEM VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VOLT 28 W/ DUAL TANK W/O DUAL TANK WHT WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/RED WIRE

ACCELERATOR PEDAL POSITION SENSOR AIR CONDITIONING SYSTEM BATT POS VOLT BLK/BLU WIRE BLK/BRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRAKE APPLY SENSOR SIGNAL BRAKE SIGNAL BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CLUTCH RELAY CONTROL COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM CRUISE CONTROL SYSTEM DATA ENGINE CONTROL MODULE ENGINE INDICATOR CTRL FLOW SENSOR SIGNAL FUEL PRESSURE REGULATOR 1 GMLAN SERIAL DATA (+) 7 GMLAN SERIAL DATA - 1 GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GROUND 4 GRY WIRE HOT AT ALL TIMES HUMIDITY SENSOR SIG LOW REF LOW REFERENCE LOW REFERENCE (2) MODE 2 SWITCH SIG MODULE LIN BUS 1 NAVIGATION SYSTEM PEDAL POSITION LOW REF 1 POSITION SIGNAL 1 POSITION SIGNAL 2 PRESSURE SENSOR SIGNAL PRIMARY RLY CONTROL RED/BRN WIRE REF RELAY COIL CONTROL RELAY FUSED SUPPLY 1 RUN/CRANK IGN 1 VOLTAGE SENSOR SENSOR LOW REFERENCE SERIAL DATA (-) (1) SERIAL DATA (-) 7 SIG SPEED CTRL SIGNAL START INDICATOR CONTROL STARTER ENABLE RLY CONTROL STARTING/CHARGING SYSTEM SWITCH LOW REFERENCE TEMPERATURE SENSOR SIGNAL UNDERHOOD FUSE BLOCK VALVE HIGH CONTROL VALVE LOW CONTROL VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE VOLT WAKEUP SERIAL DATA WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY ACTIVE GRILLE AIR SHUTTER 1 ACTUATOR ACTIVE GRILLE AIR SHUTTER 2 ACTUATOR AUXILIARY UNDERHOOD FUSE BLOCK BLK WIRE BLK/VIO WIRE BLK/WHT WIRE BLU/BRN WIRE BLU/GRN WIRE BRN/GRY WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FAN RELAY ENGINE CONTROLS IGNITION RELAY FUEL HEATER RELAY GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE HOT AT ALL TIMES IGN LATE PRODUCTION EARLY PRODUCTION LOGIC MULTI-FUNCTION INTAKE AIR SENSOR NCA WIRE RED/YEL WIRE SERIAL DATA (-) 7 SIGNAL GROUND TURBOCHARGER VANE POSITION ACTUATOR UNDERHOOD FUSE BLOCK VIO/BLU WIRE VIO/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

ACCESSORY VOLT 4 BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/GRN WIRE BRN/WHT WIRE CHARGE AIR COOLER INLET TEMPERATURE SENSOR COMPUTER DATA LINES SYSTEM GLOW PLUG 1 GLOW PLUG 2 GLOW PLUG 3 GLOW PLUG 4 GLOW PLUG 5 GLOW PLUG 6 GLOW PLUG 7 GLOW PLUG 8 GLOW PLUG CTRL 1 GLOW PLUG CTRL 2 GLOW PLUG CTRL 3 GLOW PLUG CTRL 4 GLOW PLUG CTRL 5 GLOW PLUG CTRL 6 GLOW PLUG CTRL 7 GLOW PLUG CTRL 8 GND 2 GND 5 GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE HI SPD GMLAN SER DATA - HOT AT ALL TIMES IGN 1 VOLT 21 NOT USED RED/VIO WIRE RED/YEL WIRE VIO/BLK WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WAKEUP SER DATA WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL/BLK WIRE YEL/WHT WIRE

BATTERY FUSE BLOCK BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CHARGE AIR COOLER OUTLET TEMPERATURE SENSOR COMPUTER DATA LINES SYSTEM CTRL DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE ENGINE OIL PRESSURE IND EXHAUST TEMPERATURE SENSOR 1 EXHAUST TEMPERATURE SENSOR 2 EXHAUST TEMPERATURE SENSOR 3 EXHAUST TEMPERATURE SENSOR 4 EXHAUST TEMPERATURE SENSOR 5 FUEL GAUGE IND GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES IND CTRL IND LO SPD GMLAN INSTRUMENT CLUSTER LOGIC LOW CONTROL LOW REFERENCE MALFUNCTION INDICATOR LIGHT RED/VIO WIRE REDUCTANT INJECTOR RELAY CTRL RLY CTRL SHUTDOWN SIGNAL TRANSMISSIONS SYSTEM VALVE HIGH CTRL VIO/BLK WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VOLT WAIT TO START IND WHT/GRN WIRE WHT/RED WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/WHT WIRE

BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE COMPUTER COMPUTER DATA LINES SYSTEM DATA LINES EXHAUST PARTICULATE MATTER SENSOR FUEL PUMP CTRL FUEL SENSOR SIG GMLAN SERIAL DATA (+) 7 GRN/BLU WIRE GRN/GRY WIRE GROUND 17 GRY WIRE IGNITION 1 VOLTAGE 4 LOW REF LOW REFERENCE MODULE WAKE-UP SIG NITROGEN OXIDES SENSOR 1 NITROGEN OXIDES SENSOR 2 POS VOLTAGE 53 PRESSURE SENSOR SIG PRIMARY RELAY CTRL PUMP RLY CTRL RED/VIO WIRE RED/WHT WIRE SECONDARY FUEL LEVEL SENSOR SECONDARY FUEL PUMP SECONDARY FUEL PUMP, FUEL LEVEL SENSOR ASSEMBLY SENSOR 2 LOW REF SENSOR SIG SENSOR SIG 2 SHIELD GROUND SYSTEM TEMP SENSOR LOW REF TEMP SIG VIO/BLU WIRE VIO/GRN WIRE VOLT REF VOLTAGE PHASE 2 VOLTAGE PHASE 3 WHT WIRE WHT/BRN WIRE WHT/RED WIRE YEL/BLU WIRE YEL/GRY WIRE

5-VOLT REFERENCE BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA COMPUTER DATA LINES SYSTEM ENGINE OIL LEVEL SWITCH FUEL RAIL PRESSURE SENSOR GND 16 GRN/BLU WIRE GROUND 16 HEATER CONTROL LOW HEATER CTRL IGNITION 1 VOLTAGE 4 LINE HEATER CTRL LINE HEATER LOW CTRL LINES SYSTEM LOGIC LOW REF MODULE WAKE-UP SIG POSITIVE VOLTAGE 34 PRESSURE SENSOR SIG RED WIRE RED/VIO WIRE RED/WHT WIRE REDUCTANT CONTROL MODULE REDUCTANT LINE HEATER REDUCTANT PRESSURE SENSOR REDUCTANT PUMP REDUCTANT PUMP, SENSOR ASSEMBLY (OUTSIDE OF LEFT FRAME, UNDER REAR OF CAB) REDUCTANT SENSOR MODULE REDUCTANT TANK HEATER REDUCTANT TEMPERATURE SENSOR SENSOR 5 VOLT REF SENSOR FEEDBACK SIG SERIAL DATA (-) (1) SERIAL DATA (-) 7 SMART PUMP CONTROL TANK 2 HEATER CTRL TANK HEATER LOW CTRL TEMP SENSOR SIG VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE VOLTAGE PHASE 2 VOLTAGE PHASE 3 WAKE UP SERIAL DATA WHT WIRE YEL WIRE